Massage gun



FIG. 1 is a first perspective view of a massage gun showing my new design;

FIG. 2 is a second perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a back view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a top view thereof; and,

FIG. 8 is a bottom view thereof.

The broken lines shown in the drawings depict portions of the massage gun that form no part of the claimed design. The unevenly spaced dot-dashed broken lines depict the boundary of the claimed design, the dot-dashed broken line forms no part of the claimed design. 

CLAIM The ornamental design for a massage gun, as shown and described. 